Improvement in explosive compounds



OV 1H7s155 F'IDNOQ EXPLOSIVE COMPOUND.

Patented Feb. 6.1877.

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,"UNrrnD STATE-s PATENT OFFICE' I To all whom -t may concern:

SAMUEL JOSEPH MACKIE, CAMILLE ALPHONSE FAURE, AND GEORGE FRENCH, OF EAVERSHAM, ENGLAND.

vllVl-ROVEMENTIN EXPLOSIVE COMPOUNDS.

Specification forming part of Letters Patent No. 187,155, dated February 6, 1877; application filed September 2, 1876.

Be it 'known 'that we, SAMUEL JOSEPH MACKIE, UAMLLLE ALPHONSE FAUR, and GEORGE FRENCH, all of Faversham, in the county of Kent, England, have invented anew and useful Explosive Compound for Blastand five-tenths nitrate of potassium. .-flheex-W plosive compound thereby obtained is especially applicable for use as a blasting-powder.

It is essential that the cotton or other inaterial converted into nitro-cellulose should be ,reduced to an impalpable powder, as stated above. we e'ec't by passing it between crushing-rollers, or we reduce it by edge-runners. In this way the brous nature of the cotton is entirely destroyed. We incorporate together the reduoedgun-cotton with the nitrate of han ryta and nitrate of potash, either in the dry or wet state. 1f gun-cotton' simply pulped were used in the manufacture of 'our cottonpowder only a dangerous compound, open to explosion by mere friction', 'would be obtained,

` whereas an explosive made as we have de- The reduction ot' the converted ber.

scribed is` nothing more than combustible, is very insensitive to ignition Iby concussion or by friction, and may be burnt Without any danger of explosion, while yet it can be detonated by high charges of fulminate. y

The proportions given above are essential elements in the manufacture ofthe powder to insuresafety, freedom from noxious fumes,l and capability ot' being detonated only by high charges of fulminate, while it is also only open t ignition by the strongest friction, and when lighted is merely combustible, and may be burnt with perfect immunity from any danger ofv explosion.4 'If the proportionsare much departed from, safety would nod longer be obtained. It' the gun-cotton were increased there woul be danger of' explosion by friction and concussion. .If the nitrate of baryta VVVafter-...explesion.i17.--Y l 'Whatweclaim is- ,e I The explosive compound hereinbefore describfed, consisting of a mixture,- substantial- 1y in the proportions speced',' of nitro-cellulose, reduced to an impalpable powder, ni-

trate of. baryta, and saltpetel y SAMUEL JOQLEPHIMACKIE.l CAMILLE ALPHONSE FAURE. 'GEORGE FRENCH. Witnesses:- WILMER M. HARRIS,

Artlclecl clerk to Salem 0. Harris, of N o. 17 Gracechuroh street, London, Notary Public.

Tnos. BROWN,

orrec't' in- Letters-Patent No. 187,155.

ION

It is hereby certified that in Letters Patent N o. 187,155, issued. February l6, 1877, for an improvement in Explosive Compounds, the na-me of the last mentioned grantee, wherever it appears'iinsad Letters Patent and in the specification and drawing attached thereto and forming a part thereof, was erroneously Written and printed George French instead of George Trench, the ,correct name of said grantee; that the proper corrections have been made in the les and records of the l Patent Oiice, and are hereb57 made in said Letters Patent.

Signed, conntersig'ned, and sealed this 26th ldey of July, A. D ,1881.

[SEAL] o S. J. KIRKWOOD,

Secretary of the Interior.

Gountersigned v MARBLE, Commissioner of Patents.

It is hereby certified that in Letters Patent N o. 187 ,155, issued February (i, 1877, for an improvement in Explosive Compounds, the 11a-nie of the last mentioned grantee, Wherever it appears in said Letters Patent and in the speoication andv drawing; attached thereto :md forming :t part thereof, was erroneously Written and printed George French instead of George Trench;7 the correct name of said.

grantee; that the proper corrections have been made in the files and records of the Potent Ofce, :ind are hereby made in seid Letters Patent.

Signed, conntersigned, and sealed this 26th dey of July, A. D. 1881.

[SEAL] s. J. KrRKWooD,

Secretary of the Interior. Oountersgned E. M. MARBLE,

Commissioner of Patents. 

